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Defined Benefit Pension Plans - Pension Expenses (Detail) $ in Thousands	3 Months Ended
	Jul. 31, 2023 USD ($)
Retirement Benefits [Abstract]
Service cost	$ 0
Interest cost	224
Expected return on plan assets	(328)
Recognition of net loss	145
Net periodic pension expense	$ 41

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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